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< head >
< title > Leaflet - a modern, lightweight JavaScript library for interactive maps by CloudMade - Leaflet on Mobile Example< / title >
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< meta property = "og:title" content = "Leaflet — an open-source JavaScript library for interactive maps" / >
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< meta property = "og:description" content = "Leaflet is a modern, lightweight BSD-licensed JavaScript library for making tile-based interactive maps for both desktop and mobile web browsers, developed by CloudMade to form the core of its next generation JavaScript API." / >
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< link rel = "icon" type = "image/png" href = "../docs/images/favicon.png" / >
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< body >
< div class = "container" >
< h1 > Leaflet< / h1 >
< h3 class = "alt" > A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by < a href = "http://cloudmade.com" > CloudMade< / a > < / h3 >
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< ul class = "nav clearfix" >
< li > < a href = "../index.html" > Overview< / a > < / li >
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< li > < a href = "../features.html" > Features< / a > < / li >
< li > < a href = "../examples.html" > Examples< / a > < / li >
< li > < a href = "../reference.html" > Documentation< / a > < / li >
< li > < a href = "../download.html" > Download< / a > < / li >
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< li > < a class = "twitter-link" href = "http://twitter.com/LeafletJS" > @LeafletJS< / a > < / li >
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< li > < a class = "github-link" href = "http://github.com/CloudMade/Leaflet" > GitHub Repo< / a > < / li >
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< / ul >
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< p > < a href = "../examples.html" > ← Back to the list of examples< / a > < / p >
< h3 > Leaflet on Mobile< / h3 >
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< p > In this example, you'll learn how to create a fullscreen map tuned for mobile devices like iPhone, iPad or Android phones, and how to easily detect and use the current user location.< / p >
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< p > < a target = "_blank" href = "mobile-example.html" > View example → < / a > < / p >
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< h3 > Preparing the page< / h3 >
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< p > First we'll take a look at the HTML & CSS code of the page. To make our map < code > div< / code > element stretch to all available space (fullscreen), we can use the following CSS code:< / p >
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< pre > < code class = "css" > body {
padding: 0;
margin: 0;
}
html, body, #map {
height: 100%;
}< / code > < / pre >
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< p > Also, we need to tell the mobile browser to disable unwanted scaling of the page and set it to its actual size by placing the following line in the < code > head< / code > section:< / p >
< pre > < code class = "html" > < meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" /> < / code > < / pre >
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< h3 > Initializing the map< / h3 >
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< p > We'll now initialize the map in the JavaScript code exactly like we did in the < a href = "quick-start" > quick start guide< / a > , but won't set the map view yet:< / p >
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< pre > < code class = "javascript" > var map = new L.Map('map');
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var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/YOUR-API-KEY/997/256/{z}/{x}/{y}.png',
cloudmadeAttribution = 'Map data © 2011 OpenStreetMap contributors, Imagery © 2011 CloudMade',
cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18, attribution: cloudmadeAttribution});
map.addLayer(cloudmade);< / code > < / pre >
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< h3 > Geolocation< / h3 >
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< p > Leaflet has a very handy shortcut for zooming the map view to the detected location — locateAndSetView method, replacing the usual < code > setView< / code > method in the code:< / p >
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< pre > < code class = "javascript" > map.locateAndSetView(16);< / code > < / pre >
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< p > Here we specify 16 as the maximum zoom when setting the map view automatically. Now we have a working fullscreen mobile map! But what if we need to do something after the geolocation completed? Here's what the < code > locationfound< / code > and < code > locationerror< / code > events are for. Let's for example add a marker in the detected location, showing accuracy in a popup, by adding an event listener to < code > locationfound< / code > event before the < code > locateAndSetView< / code > call:< / p >
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< pre > < code class = "javascript" > map.on('locationfound', onLocationFound);
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function onLocationFound(e) {
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var radius = e.accuracy / 2;
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var marker = new L.Marker(e.latlng);
map.addLayer(marker);
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marker.bindPopup("You are within " + radius + " meters from this point").openPopup();
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var circle = new L.Circle(e.latlng, radius);
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map.addLayer(circle);
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}< / code > < / pre >
< p > Excellent! But it would also be nice to show an error message if the geolocation failed:< / p >
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< pre > < code class = "javascript" > map.on('locationerror', onLocationError);
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function onLocationError(e) {
alert(e.message);
}< / code > < / pre >
< p > Now the example is complete — try it on your mobile phone: < a target = "_blank" href = "mobile-example.html" > View the full example → < / a > < / p >
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< p > Next steps would be to take a look at the detailed < a href = "../reference.html" > documentation< / a > and browse < a href = "../examples.html" > other examples< / a > .< / p >
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< hr / >
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< p class = "quiet" > © 2011 < a href = "http://cloudmade.com" > CloudMade< / a > . Map data © 2011 < a href = "http://openstreetmap.org" > OpenStreetMap< / a > contributors, < a href = "http://creativecommons.org/licenses/by-sa/2.0/" > CC-BY-SA< / a > .< / p >
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< a href = "http://github.com/CloudMade/Leaflet" > < img id = "forkme" src = "http://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt = "Fork me on GitHub" / > < / a >
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